Magnus effect horizontal axis wind turbine

ABSTRACT

A turbine and method which employ kinetic and potential energy of a fluid to obtain mechanical and/or electric energy, is founded on the use of bulb shaped rotating blades that interact with a fluid, such as water or air, Each rotating blade rotates around its own axis and in the radial direction of the fluid itself.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates generally to systems for converting fluid-dynamicenergy, such as from air and water, into mechanical energy. Inparticular, the invention relates to an open or closed field turbine ina wind tunnel, or hydrodynamic tunnel, for converting kinetic andpotential energy into mechanical/electrical energy in an open eolian orhydrodynamic plant.

Furthermore, the invention relates to a closed system where theconversion of energy occurs in an environment where pressure isregulated and maintained above the atmospheric, level.

2. Background Art

Eolian and hydrodynamic energy offers many advantages. It is widespreadall over the country and does not cause pollution. Compared with otherkinds of alternative energies, such as solar or geothermal energy, it iseasily available as mechanical energy and consequently can be convertedinto electric energy.

Unfortunately, present conventional wing-blade aerogenerators have alimited power coefficient and produce relatively unstable work withrespect to time. Efficient use of wind energy is considerably limited bylow energetic concentration with average annual values of power persurface unit stroked by the blade reduced to the minimum. Efficiency isalso impacted by daily and annual irregularities and variables.

Eolian plants are over-dimensioned with respect to the power generatedbecause of the aforementioned problems and also because of the lowenergetic density that is obtained from wind. Eolian plants also musthave great mechanical strength to tolerate strong winds.

Wind energy is essentially the kinetic energy of the mass of air inmotion due to barometric or thermobaric atmospheric events. Therefore,the power effective available is proportional to the cubic wind speed,but it is also in a direct relation with the potential energy of the airmass due to the earth's gravity force (10000 kg/m²—10 meters watercolumn).

Dependence of power density on cubic wind speed sets forth theconsiderable influence that local ventilation characteristics have ontechnical and economic performances of an aerogenerator according to theprior art and makes the conversion of energy more complex. If the windspeed doubles, as it often happens for short periods, it is possible toobtain eight times the power and it is necessary to provide for acontrol system to skim the wind, reducing the blades stroke surface orlowering the efficiency of the rotor to avoid overloads. On the contraryif the speed reduces itself to one half, the converted power reducesitself substantially to an eighth, making it impossible to rely on thedesigned nominal power of the eolian plant.

Many kinds of rotors are known from the prior art, but the more testedrecently have been rotors with a horizontal axis (parallel to the winddirection) that have fixed blades with a single blade, double blade,triblade, multiblade and cycloblade hub. Recently, the single bladesystem with a variable pitch terminal part of the rotor is being used inlarger plants.

Conversion systems with a suitably shaped Magnus effect rotor thatrotates with respect to the blade-holder hub, both central orperipheric, are not employed.

Patent RM 94 A 000529 owned by SILE/FLUID-SERVICE relates to a methodfor amplifying the dynamic surface pressure in mechanical machines wherethe dynamic surface pressure related to the fluid dynamic action of anygaseous or liquid composition is directed towards the external orlateral surfaces of an oppositely rotating thrust cylinder pair thusproducing downstream of the cylinders themselves dynamic thrusts, whichare greater than those obtained by means of a corresponding flat andstatic two-dimensional surface subjected to the same fluid dynamicthrust action.

Patent RM 94 A 000813 also owned by SILE/FLUID-SERVICE relates to asystem for converting kinetic and potential energy in an eolian plantthat channels fluid vein gathered by a concentrator into a central bodywhere it interacts with the thrust rotors with an optimal incidenceangle and where the reaction section with the rotors may bedimensionally regulated.

Furthermore, it is known that pressurization, a static method forfilling a closed container with predetermined pressure according to theplant model, allows energetic density. This activates the kineticcomponent of the energy incident on a rotating element, to be increasedwhen pressure and density are increased. Therefore, it is possible towork with low fluid speed and consequently low rotors speed even ifworking conditions are characterized by the same power and the sameefficiency. In fluid-dynamics this may be related to the situationwherein, in a fall hydraulic system, the static head is a basic factorto define the dam power since flow rate is a fixed value that does notchange with time. Therefore, if the hydrostatic basin supplies a limitedpower with the same section of fall tube, a greater fall pressure couldbe obtained by raising the basin.

Experimental work on Magnus effects started at the beginning of thiscentury, and has been disclosed in a number of scientific internationalpapers.

GB-A-2 031 072 discloses a wind energy exploitation system wherein thebody of the blade does not rotate around its own axis but is hinged to avertical shaft whose rotation movement generates electric energy. Theblades lift when the wind speed increases in order to allow to takeadvantage also of weak winds.

In document GB-A-2 179 014, instead, the Magnus effect is exploited.This document uses this effect for the position control of a ship or forits propulsion, but not for generating energy.

U.S. Pat. No. 4,366,386 relates to a chiral turbine with “blades” whichare perfectly cylindrical, and the turbine is placed in anon-pressurized environment.

Another example of the Magnus effect is the rotating cylinder used topower the Flettner and Cousteau rotor ship. Although cylindrical“blades” or “rotors” may be the best solution in the case of theFlettner and Cousteau rotor ship, they cannot be applied with practicaland advantageous results in the case of a relative rotation between the“rotor” and the direction of the fluid in motion. This means, inparticular, that the yield for the most common wind speeds over thecourse of the year (weak winds) would be low.

It should be noted that these solutions relate to an applicative methodof the “translation” type, which involves a lift force distribution inKNm, in a parallel form, on the whole surface of the rotating cylinder.

According to the dynamical point of view, both in the eolian andhydrodynamic environment, a geometric configuration is not suited for arotating blade that must also rotate on a rotation axis with differentcorresponding peripheral velocities that increase from the root of the“propeller” towards the terminal region of the blade, where theperipheral velocity has the largest value.

Consequently, a cylindrical configuration from the root to the end ofthe turbine (or propeller) is not adequate for the dynamicalexploitation of all velocities related to the Magnus effect.

BRIEF SUMMARY OF THE INVENTION

The mathematical computation, the numerical simulation, and the alreadyrealized turbines, have demonstrated that, in order to obtain adynamically correct form, the geometric configuration of the rotatingrotor (blade) must assume a particular geometric shape, that is a “bulb”shape, on the distal end of the rotating blade itself.

The inventor generally refers to an inventive rotor having a bulb-shapedgeometry as a “chiral rotor” or a “chiral turbine.” The meaning of theword “chiral” is an opposite dynamic action (180°) as will appear fromthe description (see for instance FIG. 4).

The inventive chiral turbine is a new machine which is suited to exploitthe dynamical components and the potential of any fluid substance inmotion at slow velocity. Examples of these fluid substances include freeair (wind), free water (rivers with low hydrostatic pressure and with alow speed of the water stream in m/s), gaseous composition (air ornitrogen in pressurized circuits).

Under the engineering point of view it is recommended to use thefollowing definitions:

chiral turbine: complete machine including the blade units

chiral rotor: single blade unit

bulb, or chiral bulb: peripheral body of the blade.

An object of the present invention is to provide a method and a turbineoperating in a closed or open (free air-river stream) cycle system toconvert kinetic and potential energy in an eolian environment, and moregenerally in a fluid-dynamic environment, wherein the rotating bladesinteracting with fluid vein are provided with their own rotation motionaround their more extended axis. This make is possible to exploitpressure amplifying effects resulting from the Magnus effect, in aparticular blade shape.

Another object of the present invention is to provide a method forconverting energy associated with fluid-dynamic actions in a pressurizedenvironment, which allows lower involved work speeds, by means ofmachines based on the application of the Magnus effect principle, at thesame time maintaining high efficiency and a high conversion rate ofkinetic and potential energy in electromechanical energy.

Still another object of the present invention is to provide a method forconverting energy associated with fluid-dynamic actions in a pressurizedenvironment, that permits reduction of the dimensions of plants andmachines where the conversion of energy associated with thefluid-dynamic action is performed.

A last object of the present invention is to provide a method and achiral turbine with an open or closed system in a wind tunnel forconverting eolian kinetic and potential energy, in a pressurizedenvironment and more generally in a fluid-dynamic and hydrodynamicambit. Although this invention implies a new conception according to thebasic principles of the same invention, it applies known technologiesand constituent materials making the invention easier to carry out.

These and other objects, which will appear from the description below,are attained by means of a system where rotating blades constituting theinteraction means with the fluid in motion, are shaped as lengthenedstructure with a bulb-shape end and are constituted as chiral rotorsthat are able to rotate on their own more extended axis according to theMagnus effect principles, besides in the radial direction according tofluid advance direction.

Such bulb shape allows the best exploitation of rototranslation speedcomponents of the rotating blade and of the incident kinetics. It is forthis reason that blades under a fluid-dynamic action are equivalent toan accelerated mass, which is placed in the zone of an energetic andpotential differential, caused by the spin rotation. Therefore, theaccelerated mass of the chiral rotor is subjected to the attractionresulting from a pressure jump, which produces aerodynamic lifts andfalls.

Hence, the rotation of chiral blades cause a condition of kinetic andenergetic differential asymmetry in the space where the pressurepotential is reduced. As this occurs just in the proximity of thetranslating mass (chiral rotor), the same is subjected to the inducedpressure differential, defining aerodynamic lifts and falls.

A temporary relative energetic unbalance, to restore the symmetry withrespect to pressure variation, produces a feedback which makes the mass(chiral rotor) subject to the potential differential that has beenestablished between the two bodies: chiral rotor—fluid. This produces aconsiderable thrust pressure on the chiral rotor.

According to another aspect of this invention, a method in which a fluidis introduced in an environment, closed by means of a containmentvessel, where pressurization is obtained by means of compressorsarranged in complementary structures is shown. Said closed environmentis subdivided into a first fluid vein delivery section comprising asequence of bipolar rotors and into a second fluid vein return section,which lies inside the first section, and comprises a second sequence ofbipolar chiral rotors.

Fluid is directed in such a direction to collide with the first sequenceof bipolar chiral rotors. Each one rotates around its own axis and isarranged coupled in a multistage sequence 180° out of phase one respectto the other, in the couple arrangement, wherein the containment vesselshape is such that at the end of the first multistage sequence of chiralrotor couples, air flows are conveyed in the return direction, in acouple of return conveyors where the aforesaid second sequence of chiralrotors are arranged, allowing the optimal exploitation of the fluid veinand of the present static potential to be reached, through their serialarrangement.

BRIEF DESCRIPTION OF DRAWINGS

Some embodiments of the invention are described hereinafter withreference to the attached drawings, for the sole purpose of betterexplaining it and without thereby limiting its scope and the number ofits possible applications. Said drawing showing individually:

FIG. 1, a view of a plant for exploiting eolian energy according to thepresent invention in an open cycle embodiment;

FIG. 2, a section of the blade/structure unit supporting the blade;

FIG. 3, a section of the chiral rotor of the plant for the exploitationof kinetic and potential energy according to the present invention, in aclosed cycle embodiment, that is in a wind tunnel;

FIG. 4, a longitudinal section of a plant for converting energyassociated with fluid-dynamic actions in a pressurized environment;

FIG. 5, a global cross section of the whole plant for converting energyassociated with fluid-dynamic actions, into electric energy, inpressurized environment;

FIG. 6, a cross section of the chiral rotor unit according to FIG. 4;

FIG. 7, a view from the top, of a section of the chiral rotor unitaccording to FIG. 4;

FIG. 8, a view of an embodiment of the circular wind tunnel kind, as atoroidal ring, in a pressurized environment according to the method ofthe present invention; and

FIG. 9, an external drawing of the containment vessel of the plant forconverting energy associated with fluid-dynamic actions, in a littleelectric pressurized plant.

DETAILED DESCRIPTION OF THE INVENTION

It must be underlined that for explanatory purposes the representationshave been schematically drawn, thus eliminating constructive detailswhich would be obvious and unnecessary for describing the preferredembodiment.

Moreover, the reference number of the nine figures corresponds to thesame mechanical functional element. A general view of an eolian plant isshown in FIG. 1, arrows A and B indicate the direction of the rotationthe blades are subjected to.

FIG. 2 instead shows a sectional structure of a chiral blade and of asupporting structure that is interfaced with the central hub chiralblade itself. A hub 1 supports rotating blade 8 built in such a way asto contain a DC or AC motor closely fitted on the terminal portion ofthe rotating blade. The hub 1 is constituted so as to take into accountthe static and dynamic stresses deriving from the double rotation, bothof the hub 1 itself and of rotating blade 8, using active magneticbearings or other rolling contact systems. An A.C. or D.C. motor 2driving rotating blade 8, fit to work with various speed, in a widespeed range, according to the dynamic load on the rotating blade orother magnetic driving unit. An over gear 3, common for these uses. Asliding contact (Pacinetti type) ring 4 for electromagnetic feeding tothe electric motor 2, to the bearings, the guides and their controlsystem. A magnetic active bearings 5 matching and balancing the rotatingmass. Magnetic guides 6 closely fitted on self-bearing load structure ofchiral blade. A closely fitted counterweight 7 on the opposite side ofthe rotating blade. A rotating blade 8, of the self supporting kind,built from composed material with a high absorption like the fibretissue of Dyneema with glass fiber, having an inserted mesh of “beesnest” cells that reinforces high dynamic stressed portions. A highmechanical strength polymer compound with a very low specific weight issuitable for this purpose. Rotating blade 8 and the terminal bulb arebuilt in their optimal geometric configuration, taking into account thenumerical results provided by the computer which carries out a numericsimulation of the laboratory model and taking into account aerodynamic,or hydrodynamic and mechanical requirements.

Of course single blade plant described could be made also as doubleblade, triblade or multiblade plant taking into consideration anincreased mechanical cost for moving rotating blades and the cost of asupporting blade.

The chiral turbine for converting kinetic and potential energy asdescribed above, is clearly only illustrative of a type of turbines thatwork with various kind of fluids (air-water), but which can use the samebasic principles. Typical examples are hydraulic applications, likeriver dams or, more generally, river barriers which perform thetransformation of kinetic and potential energy associated with water.

It is possible to use the same chiral blade system and double blade,triblade or multiblade, with peripheral bulb, in water, obtaining thesame effects that have been obtained in the air. This type of plant kinddoesn't change substantially, only the speeds of rotation with respectto the hydraulic flow change.

The proposed chiral turbine is particularly suitable for tide flows witha remarkable hydrostatic gradient and specifically for rivers with greatrunflow canals. In FIG. 3 a further embodiment of an apparatus accordingto this present invention is shown; it should be underlined that thereference number refers to the same components indicated in previousfigures, and that rotation directions A and B indicate the compositerotation motion of two oppositely rotating systems.

In this embodiment the intubated eolian plant with a single rotatingchiral blade differs from the one previously described because it isinserted in a circular peripheral container structure, or externalguides with the hub I which holds the rotating blade 8 having astructure according to the dynamic stresses produced by the rotation andtranslation of both the hub 1 itself and the rotating blade 8, by meansof active bearings or other rolling contact system. Said blade holderhub 1 carries out the function of the central hub in previouslydescribed plans, and the effective physical and dynamic functions ofchiral bulb remain unchanged. Furthermore the bulb 8 is reduced, withrespect to previous structures, to a particular maximum speed peripheralzone: in fact the supporting blade stem and the relative speed reducerwhich involve an efficiency much lower than one are eliminated.

Various bulbs 8 may be placed at equal angles, on the externalcircumference according to the particular embodiment.

By means of such a system, forces are discharged directly on thecontainment magnetic circular guides which, effectively, become a linearmotor-generator. In this embodiment the chiral bulb behavessubstantially as a linear current generator and, as for the single bladeor double blade chiral rotor with a lengthened shape, this embodimentmay be improved by means of suitable active bearings 5 matching andbalancing the rotating mass.

In this way it is possible to obtain the optimal performances withefficiencies better than those obtainable from traditional machines: theinterconnection of speed reducers, (which as said before, arecharacterized by a low efficiency), are eliminated and the plant isstructured in a closed cycle system with chiral blades, in a sequence,that exploits residual kinetic energy at any passage of the chiral unit.

In FIG. 4 a section of a conversion plant in a pressurized environmentis shown. The electrofan 40 in FIG. 4 (but the following applies also tothe plant in FIG. 8) produces an air flow in a tunnel, that is anenvironment closed externally by means of a containment vessel 41.Inside this tunnel a pressurization by means of compressors arranged incomplementary structures 42′, 42″ is produced. The tunnel is subdividedinto two sections:

a delivery section comprising a sequence of bipolar rotors 44′, 44″, . .. 44 ^(n);

a return section comprising a sequence of bipolar rotors 46′, 46″, . . .46 ^(n).

Air flow produced by the electrofan 40 is directed in the directions X′,X″ in such a way to invest the sequence of bipolar rotors 44′, 44″, . .. 44 ^(n), each one rotating on its own axis. The bipolar rotors arearranged coupled in a multistage sequence—a four stage sequence in theparticular case of FIG. 4—and the couples are 180° out of phase onerespect to the other. The shape of the containment vessel is such thatat the end of the multistage sequence of chiral bulb couples 44, the airflows are conveyed in the directions Y′, Y″, in a couple of returnconveyors 45′, 45″, where further sequences of chiral bulbs 46′, 46″,are arranged. In this way the optimal exploitation of fluid veinproduced by the electrofan 40, where to the air flow itself returns tobe brought again into the closed cycle, is obtained.

It should be noted that the sequential disposition of several bipolarrotors 44 and 46 yields also a serial sum of the single powers producedby the single bulbs: total output power is the result of the optimalexploitation of potential and kinetic energy associated with the wholefluid vein.

An intuitive example, that makes the value of involved powers and speedsconcrete, may clarify of the pressurization effect in this kind ofstructure.

The described apparatus, when working with a fluid speed of 40 mt/s,supplies a power rating of 139 MW; a power rating of 750 MW is obtainedin the case speed is risen to 80 mt/s and the pressurization is notchanged. In order to obtain such rating power level without working in a80 mt/s speed regime, it is enough to increase the pressure in thecontainer structure 11 up to 8 atm, making the fluid speed decreaseuntil 40 mt/s.

It should be noted that, by the energetic point of view, the effectivecost to obtain the pressurization is minimum, because it depends on themaintaining of a particular pressure level in a closed/isolatedenvironment with respect to the barometric changes or with respect tothe flow density; even if this does not occur with respect to thegravitational forces, because of the effect of involved active chiralmeans.

In FIGS. 5 and 6, another section, (along a plan corresponding to theline A′-A″ of FIG. 4), of the apparatus embodying the method accordingto the present invention is shown. These figures take into considerationthe structure of a chiral rotor 44 where the two electromagneticwindings 51′-51 ″ for the rotor rotation, around its own axis, as wellas light material chiral rotor structure, are set forth.

Furthermore, it is possible to consider another rotor, placeddiametrically opposed and 180° out of phase, with respect to the one inthe figure, in the more external zone of the apparatus embodying thepresent invention; it is also possible to plan another couple of chiralrotors externally to the one shown in FIG. 6, which allows to exploitthe return flow coming from the electrofan, while the shown rotor isarranged to be stroked only by the delivery of flow X″. When the rotorstarts rotating it behaves as a rotor of a linear electric motor, inwhich statoric part is constituted by the two frameworks GA and GB wherebrushes means 52′ and 52″ with their relative pole shoes 53′ and 53″, asclearly shown in FIG. 7, are placed. FIG. 7 is a section, from the top,of the same chiral rotor shown in FIG. 6; said systems have the task toconvert energy from the static and fluid-dynamic potential and from theoriginal fluid-dynamic mechanism 40, into electric energy, through thecombined deviation Magnus effects. It should be noted that, preferably,the steel section frameworks, contain the linear generator statoric partwhich passes through the whole framework on both sides.

The two opposite bipolar, chiral rotors, which define lifts and falls,behave like two rotors of the Flettner roto-ship, where the lineargenerator, behaving as the loan, is the ship. The analogy is even moreappropriate because of the low speed regime obtained by means ofpressurization which allows a high vortical efficiency, in the U-shapedregion of the chiral turbine. Of course a practical embodiment of theprimary blower motor may be carried out through a peripheral bladeturbine to be inserted directly into the tunnel frameworks and dividing,if necessary, the driving power in the two tunnel sections; this systemallows to reduce spaces and to improve fluid-dynamic efficiency ofdynamic flows in motion.

Nowadays by means of extra light technologies and composed materials,structures are realized, characterized by an excellent resistance totoil and dynamics stresses, even if they are not heavy structures.

This considerable weight reduction allows a very limited electromagneticdrive powering, both in the electric section and in the electromagneticspeed regulation section. Therefore energetic costs for activatingchiral turbines are very low and insignificant for the global efficiencyof the system.

In FIG. 8 a section along the usual plan A′-A″, of a further embodimentof the present invention, is shown; this embodiment is based on atoroidal closed structure, which offers the advantage of not having areturn section in the wind tunnel, and obtaining homogeneous circulationand limited air pressure drops along the intubated circuit 41.

As previously described, by employing the same kinetic energy, suchsystem allows a conversion of the static and dynamic potentials with themaximum efficiency, considering the work requirements of thepressurization which allows an effective space reduction, an improved“quality factor” of the dynamic system according to the invention and asimplified construction. In a further embodiment, instead of beingarranged in a bipolar structure, the chiral bulbs may be inserted in thetunnel structure both in tripolar and quadripolar structure in such away as to lower peripheral speeds of bulbs themselves. In this wayoperative requirements of a low peripheral speed under the sameproduction of electric energy, consistently with electromagnetic workload is complied with.

FIG. 9 shows an external drawing of a pressurization cell, according tothe method of the present invention. Said cell is built in a rectangularshape rather than in a cylindrical shape, as for usual pressurizedtanks; the rectangular shape comes from the experience and from thenecessity to perform the maintenance of electromagnetic and movablemechanical parts. Said system, already used for vacuum stations, offersremarkable space advantages, disassembling facilities, complete openingof cell, quick maintenance of electromagnetic parts. Modules of thesecells, as the one shown in FIG. 9, are already known. They have a lengthup to 11 mt with a cross surface of 9 m².

These electric ministations are particularly suitable for smallfactories, hospitals, hotel plants, civil and industrial agglomerates,naval motors, etc.

More generally according to the present invention the method and theplant may be employed as kinetic energy accumulators, in motor vehiclessuch as motor-cars, trucks, buses, motor-lorries, aircraft, orbitalspace stations, ships, boat motors. Such accumulation of kinetic andpotential energy allows the maximum energetic saving and the minimumpollution due to the fluids or compounds employed.

Of course, the produced energy can be used to produce, both electricenergy and heat by means of suitable diathermic oil heat exchangers andconsequently, hot water, overheated vapor, low pressure vapor, middlepressure vapor as well as all general services for industry or publicand private buildings.

It is worth taking into consideration a further aspect of theapplication of chiral turbines and of the Magnus effects starting fromthe fact that reversibility is an intrinsic condition of allfluid-dynamic machines. If instead of working as a converter ofpotential and kinetic energy, chiral rotors are employed in an inverseaction, that is to say moved by a motor, keeping their characteristicsof chiral rotation produced by the respective driving motors, afluid-dynamic moving is obtained that can be sent, as a lift or as afall, as regards to the earth reference system, according to the righthanded or left handed rotation, respectively. Considering thepossibility to use this system as a vertical lift system, like the oneproduced by the rotors of a traditional helicopter, the main differencewith traditional rotors is that with chiral rotors there is no pumpingand spin activity of incident air but there is the component relative toa considerable hole of potential and of pressure: under a qualitativepoint of view; such pressure hold works similarly to when an aeroplaneenters into an air pocket, but in the opposite way.

What is claimed is:
 1. A turbine for converting energy associated withfluid-dynamic actions comprising: a bulb-shaped rotating blade whichrotates around its own extended axis according to the Magnus effectprinciples.
 2. A turbine according to claim 1, further comprising: acentral hub supporting said bulb-shaped rotating blade; magnetic activebearings attached to said central hub; magnetic guides fitted on thebulb-shaped rotating blade; an electric motor; an overgear; a staticrotating ring with sliding electric contacts for electromagnetic feedingto the electric motor, the magnetic active bearings, guides, and totheir control system.
 3. A turbine according to claim 2, furthercomprising a single bulb-shaped rotating blade.
 4. A turbine accordingto claim 2, further comprising multiple bulb-shaped rotating blades. 5.A turbine according to claim 1, further comprising: a circularperipheral container structure.
 6. A turbine according to the claim 1having one bulb-shaped rotating blade.
 7. A turbine according to theclaim 1 having more than one bulb-shaped rotating blade.
 8. A conversionplant comprising: a tunnel; a containment vessel; a compressor; saidtunnel is divided into a delivery section and a return section; saiddelivery section further comprises a first sequence of chiral rotors;said return section further comprises a second sequence of chiralrotors.
 9. A conversion plant according to the claim 8, wherein fluidexiting the second sequence of chiral rotors enters the deliverysection.
 10. A conversion plant according to the claim 8, wherein eachchiral rotor works effectively as the rotor of a linear electric motor,in which the statoric pan is constituted by two frameworks where bushmeans are placed with their relative pole shoes having said bush meansthe task of converting original potential and fluid-dynamic/mechanicalenergy to electric energy.
 11. A conversion plant according to the claim8, wherein the containment vessel is a toroidal circular ring having asequence of chiral rotors disposed on the toroidal circular ring.
 12. Aconversion plant according to the claim 11, wherein the sequence ofchiral rotors comprises six bipolar rotors.
 13. A conversion plantaccording to claim 11, wherein the chiral rotors are bipolar, tripolar,or quadpolar shaped.
 14. A turbine according to the claim 11, whereinthe toroidal circular ring further comprises a sequence of eight chiralrotors disposed along the circular perimeter.
 15. A method forconverting energy associated to fluid-dynamic actions, in which aplurality of rotors are disposed transversally with respect to themoving fluid, said rotors constituting the interaction means with themoving fluid and being formed by rotating blades, which rotate aroundtheir own axis in order to take advantage of the principles of theMagnus effect, and which are further rotated by the fluid itself in aplane arranged transversally to the moving fluid, the method beingcharacterized in that at least one rotating blade has a bulb shape. 16.A method according to claim 15, characterized in that said rotatingblades are utilized in a pressurized environment.
 17. A method accordingto claim 16, characterized in that a bulb which is deprived of the stemof the “blade”, is used in the method itself, wherein said rotor or bulbslides along frameworks that form the statoric part of a linear motor,whereas pole shoes form the magnetic moving parts; the rotation of thebulb being effected by means of sliding electric contacts which supplyelectromagnetic windings.
 18. A turbine for converting energy associatedwith fluid-dynamic actions comprising: a rotating blade having a distalportion that is bulb shaped which rotates around its own extended axisaccording to the Magnus effect principles.